Question

please ans fast b ka 1

Answer 1

0.7n = 0.56×0.56 - 0.21×0.21/ 0.56+0.21

0.7n = 0.56^2 - 0.21^2/ 0.56+0.21

0.7n = (0.56+0.21)(0.56-0.21) / (0.56+0.21)

0.7n = 0.56-0.21

0.7n = 0.35

n = 0.35/0.7

n = 0.5


Thanks