If 21168 = x4 × y3 × z2, find the values of x, y, z.
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Given,
21168 = x4 × y3 × z2
Factorizing 21168, we get :
⇒ 21168 = 24 × 33 × 72
⇒ 24 × 33 × 72 = x4 × y3 × z2
⇒ x = 2, y = 3, z = 7
Hence, x = 2, y = 3, z = 7.
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If 1960 = 2a × 5b × 7c, find the values of a, b, c. Hence, calculate the value of 2-a × 5-c × 7b