New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Powers and Exponents Self Practice 4B Solution
(1) Multiply and write the product as one power.
(a) 25 x 23
(b) 47 x 45
(c) 98 x 97
(d) 105 x 103 x 10
(e) (1/2)7 x (1/2)3
(f) (-7/9)11 x (-7/9)6
(g) (5/13)9 x (5/13)11
(h) (-4/15)8 x (-4/15)5 x (-4/15)9
(i) p7 x p8 x p9 x p6
(2) Divide and write the quotient as one power.
(a) 36 ÷ 34
(b) 711 ÷ 75
(c) (-11)7 ÷ (-11)4
(d) x10 ÷ x4
(e) (1/3)7 ÷ (1/3)5
(f) (-8/17)20 ÷ (-8/17)15
(g) (3/19)8 ÷ (3/19)
(h) (-23)7 ÷(-23)7
(i) p5 / p
(j) (-x)17 / (-x)5
SOLUTION 1 & 2:
(3) Simplify, leaving each answer in exponential form.
(a) (34)2
(b) (65)7
(c) (172)3
(d) [(7/3)2]5
(e) [(-7/8)6]5
(f) (m9)3
(g) (t4)4
(h) (n10)9
(4) Simplify:
(a) (xy)2
(b) (7a2)3
(c) (-2x5y2)7
(d) (-3p3q4)4
SOLUTION 3 & 4:
(5) Simplify:
(a) (83)2 ÷ 84
(b) (22)3 x 52
(c) (3a2)3 ÷ (-3a6)
(d) (-2x2y3)4 x (1/2 x4y7)4
(e) (195)0
(f) (50 – 70) x 350
(6) Find the value of x in each case.
(a) x6 = 64
(b) (-3)x -1 = -243
(c) (3/4)4 x (3/4)5 = (3/4)5x + 1
(d) 59 ÷ (5)3 – x = 510
(7) Simplify the following:
(a) (33)2 x 52 / 92 x 5
(b) 38 x a6 / 93 x a3
(c) (50 + 40 + 30) x 34
(8) If [3m2 ÷ (3m)2 ]m = 1/81 then the value of m is
(a) -3
(b) -6
(c) -3
(d) 4
SOLUTION 5, 6, 7 & 8:
Please send 4c & 4d solutions
Please send 4c and4d
Plz send ex 4cand d
yes mam
i am so happy to solve this silly answers in my life
hi manish
Ex 4 C and D?