If x = ( 42) + 41 + ( 42) + 41 + .......... (41 terms)
and y = ( 13) + 11 + ( 13) + 11 + .......... ( 30 terms)
then the value of y – x is
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41÷2=20.5
20.5×41=840.5
20.5×40=861
30÷2=15
15×13=195
15×11=165
y-x=195+165-840.5+861=380.5
20.5×41=840.5
20.5×40=861
30÷2=15
15×13=195
15×11=165
y-x=195+165-840.5+861=380.5
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