Infinite series by Madhava of Sangamagrama

Infinite series: Madhava of Sangamagrama | Madhava was the first to develop an approximation with multiple infinite ranges, which has been called “a decisive step beyond the infinite method of ancient mathematics in taking the limit-transformation to infinity”.

The depression at the free end of a cantilever of length 1.5 m is 10 cm when a certain load is suspended at this end what is the depression at a distance 0.5m from the fixed end?

given l=1.5m ,delta = 10cm , x = 0.5 m ,y =?
Depression at a distance x from the fixed end

How many 3 digits numbers can be formed from the digits 1,2,3,4,5 and 6 if repetition of the digit is allowed and if repetition of the digit is not allowed?

The first digit can be selected in six ways; and another digit can also be selected in six ways Including the third digit increases

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