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) Ia chemical Atomic fusion , neutrons are got tripled after every reaction. If 30 numbers of neutrons were present at the beginning at the reaction , find after how many reactions the number pf neutrons be 17,71,470.

After 11 reactions the number of neutrons will be 1771470.

a1 = 30
a2 = 90
a3 = 540
an = 1771470
r = 90/30 = 3

Substitute the values in the formula an = a1 * r n - 1


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