Analytic solutions of Brans–Dicke cosmology: Early inflation and late time accelerated expansion

We investigate the most general exact solutions of Brans-Dicke cosmology by choosing scale factor "a" as new independent variable. It is shown that a set three field equations can be reduced to constraint equation and first order linear differential equation. Thus this solvable when one supplies following pairs functions: ({\Phi}(a), \r{ho}(a)), V(a)) or H(a)). A universe with single component energy-matter density studied. seen there no constant energy density, Hubble function still contains term which causes exponential expansion. This expressed in terms initial values universe. An early present dark are In addition late time accelerated expansion also explained cosmic domain walls. If we take parameter w>4*10^4 formulas reduce {\Lambda}CDM cosmology. Therefore comparison our results recent observations type Ia supernovae indicates eighty-nine percent may consist walls while rest matter.