If \( \sin x+\cos x=y^{2}-y+a \) is not satisfied by any real
value of \( x \) for any \( y \), .... VIDEO
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\begin{array}{l}
S=1+\frac{1}{(1+3)}(1+2)^{2}+\frac{1}{(1+3+5)}(1+2+3....
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